If you're looking for a clean, quite, and new place to stay, Ken is a great option! It's location is ideal- not too far from DMK airport, plenty of shops, 7-11, food vendors, grocery store, etc. and the BTS is only a 5 min walk away. It feels like an authentic neighborhood. If you're looking to step outside of the typical touristy areas of Bangkok, this place is a great alternative.
The building is new, with a very modern design, and the staff are very friendly. Most importantly, it is very clean, with daily cleaning services. The bed is very comfortable, and the room is very quiet with little to no street noise despite a balcony overlooking the side street.
Our only issue throughout our 4 days was that wifi was finicky. It was either very slow, or not working at all.
Overall, we really enjoyed our stay, and would return if back in Bangkok.